Update dependency @gitlab/ui to v78

This MR contains the following updates:

Package	Type	Update	Change
@gitlab/ui	dependencies	major	77.6.0 -> 78.1.1

MR created with the help of gitlab-org/frontend/renovate-gitlab-bot

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Release Notes

gitlab-org/gitlab-ui

v78.1.1

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Bug Fixes

• GlDuoChat: allow typing prompt while streaming (bc107bf)

v78.1.0

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Features

• GlDuoChat: explicitly disable Experimental Badge (d701cc9)

v78.0.0

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Features

• GlDuoChat: refactor hasFeedback to rely on props (97d1664)

BREAKING CHANGES

• GlDuoChat: This commit refactors the GlDuoChat Feedback indicator on every message to use the information coming in from props not from localState.

v77.7.0

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Features

• GlLink: adding deprecated export for upcoming breaking changes (4a633ce)

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